@codebrainz Geany 1.36 downloaded binary from the releases. Mac OS version is Catalina 10.15.4.
Just to add a little more. Eventually, after I closed some stuff here and there and reopen things (while leaving Geany in fullscreen.) The behavior in 2 turned to the behavior in 1, even while Geany was still full screen. So more odd behavior there, but it was more usable that way.